import java.util.Scanner;

public class lianxi37 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("请输入排成一圈的人数：");
        int n = sc.nextInt();
        boolean[] arr = new boolean[n];
        for (int i = 0; i < arr.length; i++) {
            arr[i] = true;
        }
        int leftCount = n;
        int countNum = 0;
        int index = 0;
        while (leftCount > 1) {
            if (arr[index] == true) {
                countNum++;
                if (countNum == 3) {
                    countNum = 0;
                    arr[index] = false;
                    leftCount--;
                }
            }
            index++;
            if (index == n) {
                index = 0;
            }
        }
        for (int i = 0; i < n; i++) {
            if (arr[i] == true) {
                System.out.println("原排在第" + (i + 1) + "位的人留下了");
            }
        }
    }
}
